Link to the security audit. Update dependencies. (#376)

* Link to the security audit.

* Update dependencies.

Cargo.toml

@@ -26,7 +26,7 @@ byteorder = "1.2.3"
 derivative = "1.0.1"
 env_logger = "0.6.0"
 failure = "0.1"
-hex_fmt = "0.2"
+hex_fmt = "0.3"
 init_with = "1.1.0"
 log = "0.4.1"
 rand = "0.6.1"
@@ -38,7 +38,7 @@ threshold_crypto = "0.3.0"
 tiny-keccak = "1.4"
 
 [dev-dependencies]
-colored = "1.6"
+colored = "1.7"
 crossbeam = "0.6"
 crossbeam-channel = "0.3"
 docopt = "1.0"

README.md

@@ -5,6 +5,9 @@
 
 Welcome to a [Rust](https://www.rust-lang.org/en-US/) library of the Honey Badger Byzantine Fault Tolerant (BFT) consensus algorithm. The research and protocols for this algorithm are explained in detail in "[The Honey Badger of BFT Protocols](https://eprint.iacr.org/2016/199.pdf)" by Miller et al., 2016.
 
+An [official security audit](https://github.com/poanetwork/wiki/blob/master/assets/pdf/hbbft-audit-report.pdf) has been completed on `hbbft` by [Jean-Philippe Aumasson](https://aumasson.jp/).
+
+
 Following is an overview of HoneyBadger BFT and [basic instructions for getting started](#getting-started).
 
 _**Note:** This library is a work in progress and parts of the algorithm are still in development._